Screw the trammel to the workpiece, centering it on the circle you want to cut out. Mount a straight plunge-cutting bit in your router and set the router bit to cut about 3/8 in. deep for the first pass. A plunge router works best, but if you don't have one, hold the router above the wood and start it. Fixed-base and plunge routers work fine for decorative edge cuts. To make cuts in the interior of a surface, such as keyhole slots or mortises, you'll need a plunge router. Kits are available that allow you to switch a router motor between fixed and plunge bases. The router should have the speed range for your needs. How To Finish Plywood Edges Trim the Veneer. Using scissors, trim the veneer strip to a length about 1 inch longer than the board's edge. Position the Veneer. Place the end of the veneer onto the board, leaving a slight overhang. Press the End in Place. Finish Adhering the Veneer. Press the Glue in Place. Trim the End. Trim the Edges. Sand the Edges. A router will work fine on the edges of either ApplyPly or baltic birch. The glue in the plywood may dull the router bit slightly more quickly than solid wood but if you are only doing one desktop this is not really a factor. From an aesthetic standpoint, you will be able to see the veneer layers on the edges. When looking straight down at the top of a router, the bit rotates in a clockwise direction. That means you should move the router from left to right, but—and this is important—that's only true when the router is positioned in the middle between you and the workpiece.
Common Types of Router Bit Rabbeting Router Bits. Rabbeting router bits produce a straight vertical and horizontal cut, and are designed specifically to cut a rabbet (notch) in the edge of a material. Flush Trim Router Bits. Chamfer Router Bits. Edge Forming Router Bits. Molding Router Bits. Raised Panel Bits. Joinery Bits.
For both inside and outside mounts, measuring arches is simple. First, measure the base width inside the arch opening. Then measure the height at the middle, or tallest point inside of the arch opening. A perfect arch means that the height of the arch will be exactly half the width of the base measurement.
Based on the shape of construction arches are classified into 10 types and they are discussed below. Flat Arch. Segmental Arch. Semi-Circular Arch. Horse Shoe Arch. Pointed Arch. Venetian Arch. Florentine Arch. Relieving Arch.